Question

Distinguish between the following:

Farsightedness (Hypermetropia) and Nearsightedness (Myopia).

Answer 1

Farsightedness:

1. In hypermetropia, a human eye can see distant distinctly but is unable to see nearby objects clearly.

2. In this case, the image of a nearby object would be formed behind the retina.

3. This defect can be corrected using a convex lens of appropriate power.

Nearsightedness:

1. In myopia, a human eye can see near objects distinctly, but is unable to see distant objects clearly.

2. In this case, the image of a distant object is formed in front of the retina.

3. This defect can be corrected using a concave lens of appropriate power.